* lisp/vc/vc-rcs.el (vc-rcs-register): Avoid crashes with some old
ports of 'ci' on MS-Windows by always passing the -t- switch.
;; if available, use the secure registering option
(and (vc-rcs-release-p "5.6.4") "-i")
"-u"
- (and comment (concat "-t-" comment))
+ ;; Some old MS-Windows ports of RCS crash when "ci -i" is
+ ;; invoked without -t; indulge them.
+ (concat "-t-" (or comment ""))
(vc-switches 'RCS 'register))
;; parse output to find master file name and workfile version
(with-current-buffer "*vc*"